Re: What is the show command that i can use the see the actual b

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Posting

We're only starting to deploy sup2Ts, but its show version doesn't have something like (from a sup720):

System image file is "sup-bootdisk:s72033-advipservicesk9_wan-mz.122-33.SXI9.bin"?

[edit]

Did find one of our new sup2Ts, and its show version has:

System image file is "bootdisk:s2t54-advipservicesk9-mz.SPA.150-1.SY3.bin"

Re: What is the show command that i can use the see the actual b

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Posting

Ah, well if the sup2T is like the 720s, the actual booting is done by the images on the SP and/or RP. They, in turn, boot the IOS (according to boot strings, if so configured and enabled).

For multiple IOS images, including a reduced IOS image, you would need to look at the boot strings. Then check, for any image not actively running, check whether there's really an image where the boot string says it should be.

Again, not very familiar with the sup2T, but on a 720 you can specify just a device as part of the boot string, and the boot process will look for any valid image (I believe restricted to the root of the device) and boot it.

In other words, except for the running image, you need to analyze how the device is configured to boot using the boot strings (i.e. config-reg), whether boot strings have been defined, and whether there are valid images on your different flashes, and whether they all agree.

Even without explicit boot strings, a (720) can be configured to default boot using first valid IOS image found on its default boot device.

You asked about the "running image", again show version tells you that, but for how that image was actually selected during the boot process depends on all the above. Again, what image might be selected to boot into, depends on all the above.

As some of the boot devices can be changed on the fly, an accurate analysis of what should boot isn't a guarantee of what will be actually be booted at time of boot.

Personally, I like (on 720s):

boot system disk1:

boot system disk0:

boot system bootdisk:

Which allows me to change IOS by changing CFs in disk1 and disk0, and without touching config.

What is the show command that i can use the see the actual boot

Thanks for your answer !

So, no command exist to verify what is the version of this image tha running on my router: s2t54-boot-mz.spaxyzSY.bin

I can only verify the image save under the flash with the command (dir) and I can verify what is configure under the boot string. no other command exist to verify if what is configure is really the same image that is running. When i say image, I always refer to the same image s2t54-boot-mz........... not the system image.

Re: What is the show command that i can use the see the actual b

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Re: What is the show command that i can use the see the actual b

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

I believe that IOS "boot" version is unnecessary. The ROMMON can boot the main IOS directly.

This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
"Th...
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Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
1. commandoversms.tcl
2. PDF with instructions on how to load and use the .tcl file.